The roman numeral corresponding to 1,000 is M.

If we think purely in terms of the strokes comprising M, then each of "/" and "\" have the same length and are smaller than "|" and accordingly may qualify as smaller of the "parts"

If we think purely in terms of numbers, then since V is the roman numeral for 5, and "I" is the roman numeral for 1, and the "I" part (two vertical straight lines) of M is numerically smaller than the "V" part ( that is the lines joining the two vertical lines), we can assert that each of the "I" corresponds to the smaller "part" of 1,000.

Obviously, these are **not **the *precise answers* to the given problem as presented, since only the "*smaller"* part(s), and not the *smallest part* is presented in each, but this does serve to a proposed answer to a modification of the same.

*Edited on ***June 28, 2008, 7:17 am**